Geophysical Grids for Southwest Australia's Great Australian Bight

AGSO produced digital grids integrating bathymetry, gravity, and magnetic data for a large marine region. The dataset combines land, marine, and satellite sources, processed through a network adjustment of ship-track data. This work involved cooperation with Desmond Fitzgerald & Associates and the Australian Hydrographic Office.

Use Cases

• Model seabed topography and geological structures from bathymetry and gravity anomaly grids.
• Analyze crustal composition and magnetic basement depth using magnetic field intensity grids.
• Integrate ship-track gravity data with satellite-derived data for regional geophysical mapping.
• Study sediment thickness and basin architecture by correlating bathymetric and magnetic grid data.

Strengths

• Covers a large quadrant (24-46S, 106-140E) of southwest Australia.
• Integrates multiple data sources: land, marine, and satellite.

Limitations

• Specific row counts, grid resolutions, and data density metrics are unknown.
• Temporal range for the source data is not specified, potentially limiting time-series analysis.

Provenance

Source

Australian Geological Survey Organisation (AGSO), now Geoscience Australia.

Collection Method

Network adjustment performed on marine ship-track data, combined with onshore and satellite-derived data.

Time Range

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Freshness

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Geography

Southwest quadrant of Australia (24 - 46S, 106-140E), including the Great Australian Bight.